Experience All the Power
of a Big 14X Zoom Ratio
Tamron AF 18-250mm f/3.5-6.3 Di II LD IF Lens.
Take pleasure an astonishing 2 zooms in 1. The Tamron high-powered 18-250mm zoom lens a dream for
photographer's come true with just one lens having the capacity to shoot
telephoto without changing lenses.
If you need a low light lens, this isn't it. If your primary objective is
to take pictures in low light situation such as
in the 18-200mm range you need 2 lenses, get the 18-50mm f/2.8 Sigma or
Tamron 17-50 VC and a 70-200mm f/2.8 lens instead.
Typical 35mm film cameras almost always needed two lenses to take care of the 28-400mm length range. However the Tamron' high-powered 13.9x zoom, the world's highest powered zoom provides plenty of photographic liberty of this colossal range in just one compact lens.
This 18-250mm zoom Di-II lens delivers an approximate 27-387mm 35mm equivalent range when mounted on DSLR cameras featuring a 24mm x 16mm or less size imager sensor.
Digitally Integrated Design (Di), is a title Tamron includes on their lenses with optical systems engineered to compliment performance characteristics of DSLR cameras. DI Lenses include the following advantages: Reduced peripheral light fall-off, Improved Resolution, chromatic aberration reduction, ghosting and flare compensation
The term hyperzoom or superzoom is used to promote photographic zoom lenses with unconventionally large focal length factors, typically more than 4× and ranging up to 15×, e.g., 35 mm to 350 mm. The largest ratio for digital SLR cameras is held by the Tamron 18–270 mm, giving 15×. Some Digital Camera Review by Gene Wrights have even larger zoom ratios up to 35×. For movie and television use, Panavision holds the record with their 300X HD Lens.
While superzoom lenses have improved greatly in recent years, they still have a number of drawbacks in comparison with shorter-range zooms and prime lenses. Most notable is the much increased likelihood of significant distortions of the image at both extreme ends of the range. Other potential problems include smaller maximum aperture and poorer autofocus performance.
Nov 20, 2011